Finding the Fourth Proportional to 23,689.15, 32,690.81 and 13,078.55

Step by Step Solution

1. Step 1: Write the proportion equation
   23,689.15 : 32,690.81 = 13,078.55 : x
2. Step 2: Convert to fraction form
   23,689.15/32,690.81 = 13,078.55/x
3. Step 3: Cross multiply
   23,689.15x = 32,690.81 × 13,078.55
4. Step 4: Simplify right side
   23,689.15x = 427,548,507.55
5. Step 5: Solve for x
   x = 427,548,507.55/23,689.15
6. Step 6: Final answer
   x = 18,048.29